ManTech Awarded $33.5 Million to Provide Advisory and Assistance
Support for the Combating Terrorism Technical Support Office

January 18, 2013 08:00 AM Eastern Daylight Time

FAIRFAX, Va.--(BUSINESS WIRE)--The Combating Terrorism Technical Support Office (CTTSO) has awarded
ManTech International Corporation (NASDAQ:MANT) a prime contract to
provide scientific, engineering, technical, and administrative support
to the CTTSO. The cost-plus-fixed fee contract has a one-year base
period and two one-year options with a potential value to ManTech of
$33.5M.

“The CTTSO customer has unique operational and technical demands to
quickly deploy advanced solutions in support of the global war on
terrorism”

Under the contract, ManTech will continue to provide the CTTSO and its
subordinate offices with Advisory and Assistance Services (A&AS) and
Systems Engineering and Technical Assistance (SETA) services. ManTech
professionals will also continue to assist with managing acquisitions
and projects to rapidly field combating terrorism solutions at home and
abroad.

The mission of the CTTSO is to conduct the National R&D Program for
Combating Terrorism through rapid research, development and prototyping.
Funding, task selection and task management are not dictated by any
single agency, and community need determines task priority. Requirements
continually evolve and are defined by end users consisting of over 100
federal agencies and state, local, international and non-government
organizations.

"The CTTSO customer has unique operational and technical demands to
quickly deploy advanced solutions in support of the global war on
terrorism,” said Terry M. Ryan, president and chief operating officer of
ManTech's Emerging Markets Group. "We are pleased to continue our
technical support to the CTTSO's critical mission."

About ManTech International Corporation

ManTech is a leading provider of innovative technologies and solutions
for mission-critical national security programs for the intelligence
community; the Department of Defense, including its health
organizations; the departments of State, Homeland Security, Energy and
Justice, including the Federal Bureau of Investigation (FBI); the space
community; and other U.S. federal government customers. We provide
support to critical national security programs for approximately 60
federal agencies through approximately 1,000 current contracts.
ManTech's expertise includes command, control, communications,
computers, intelligence, surveillance and reconnaissance (C4ISR)
lifecycle support; cyber security; global logistics support;
intelligence/counter-intelligence support; information technology (IT)
modernization and sustainment; systems engineering; test and evaluation;
and health IT. ManTech supports major national missions, such as
military readiness, terrorist threat detection, information security and
border protection. Additional information on ManTech can be found at www.mantech.com.

Forward-Looking Information

Statements and assumptions made in this press release, which do not
address historical facts, constitute “forward-looking” statements that
ManTech believes to be within the definition in the Private Securities
Litigation Reform Act of 1995 and involve risks and uncertainties, many
of which are outside of our control. Words such as “may,” “will,”
“expect,” “intend,” “anticipate,” “believe,” or “estimate,” or the
negative of these terms or words of similar import are intended to
identify forward-looking statements.

These forward-looking statements are inherently subject to risks and
uncertainties, and actual results and outcomes may differ materially
from the results and outcomes we anticipate. Factors that could cause
actual results to differ materially from the results we anticipate,
include, but are not limited to, the following: adverse changes in U.S.
government spending levels for programs we support due to budgetary
constraints affecting federal government spending, changing mission
priorities or other factors; adverse changes in our mix of contract
types; failure to retain existing U.S. government contracts, win new
contracts or win recompetes; failure to obtain option awards, task
orders or funding under contracts; risk of contract renegotiation,
performance, modification or termination; competition; failure to
maintain strong relationships with other contractors; failure to
successfully integrate recently acquired companies or businesses into
our operations or to realize any accretive or synergistic effects from
such acquisitions; risks associated with complex U.S. government
procurement laws and regulations; adverse results of U.S. government
audits of our government contracts; risks of financing, such as
increases in interest rates and restrictions imposed by our outstanding
indebtedness, including the ability to meet financial covenants, and
risks related to an inability to obtain new or additional financing; and
failure to identify, execute or effectively integrate future
acquisitions. These and other risk factors are more fully discussed in
the section entitled “Risks Factors” in ManTech’s Annual Report on Form
10-K previously filed with the Securities and Exchange Commission on
Feb. 24, 2012, Item 1A of Part II of our Quarterly Reports on Form 10-Q,
and, from time to time, in ManTech’s other filings with the Securities
and Exchange Commission.

The forward-looking statements included herein are only made as of the
date of this press release, and ManTech undertakes no obligation to
publicly update any of the forward-looking statements made herein,
whether as a result of new information, subsequent events or
circumstances, changes in expectations or otherwise.